James teipp



(No Model.)

J. TRIPP.

SEWING MACHINE SHUTTLE. No. 361,337. Patented Apr. 19, 1887.

W ina sea:

- NITED STATES PATENT OFFICE.

JAMES TRIPP, OF NEW YORK, N. in, ASSIGNOR E oNEHALE TO GEORGE D.

' GARVIE, OF SAME PLACE.

SEWING-MACHINE SHUTTLE.

SPECIFICATION forming part of Letters PatentNo. 361,337, dated April 19, 1887.

Application filed May 13, 1886.

Improvements in Sewing-Machine Shuttles, of

which the following is a specificatiomrefer: ence being had therein to the accompanying drawings.

My invention relates to that class of cylindrical sewing-machine shuttles open at their rear ends and commonly known as openended shuttles, the object of my invention being to provide shuttles of this character from which the bobbin-thread will run at all times with a uniform tension with no liability of breaking, as sometimes occurs with fine thread when the bobbins are nearly empty, and in which the bobbins will be securely held, so that they cannot accidentally fall out, but from which the bobbins can be readily removed when desired.

My shuttle is also of the class known as self-threading, and I construct the openended threading-slot in such a way that it is impossible for either the needle or shuttle thread to catch therein when the shuttle is in operation.

In carrying my invention into effect I provide my shuttle with an interior pin or spindle, on which is loosely placed a sleeve held on said spindle by a head at the outer end of the latter. The bobbin is hollow and fits somewhat tightly on the sleeve, the latter being preferably split or provided with one or more springs or spring-tongues to fit against the interior of the bobbin, so as to hold the latter on said sleeve and thus prevent it from accidentally coming out of the shuttle when the latter is being handled. As the sleeve on which the bobbin is held rotatesloosely on the spindle, andas the flanges of the bobbin are held from contact with the interior of the shuttle, the bobbin-thread will run off with a uniform tension, and sudden jerking and breaking of the bobbin-thread is thus avoided. The open.-

ended threading-slot runs from the lower side Serial No. 202,072. (No model.)

or aperture at the upper side of the said shuttle, the said slot being shown in the present instance as extending diagonally rearward from a point near the thread-guard. To enable the bobbin to be readily removed,the rear end of the lower side of the shuttle-shell is cut away to a point just inside of the outer flange of the bobbin.

. In the drawings, Figure l is a plan view of my improved shuttle. Fig. is a side view, and Fig. 3 a longitudinal section, of the same. Fig. 4 is a detail view of the bobb1n-supporting pin or spindle. Figs, 5 and 6 are detail views of the bobbin-holding sleeve, and Fig. 7 shows a modified form thereof.

A denotes the shuttle shell or body, and B the tension-spring having ordinary thread-fin-..

gers, b and I), and thread-guard b.

O is the open-ended threading-slot extending from the lower side of the heel of the shuttle forward and upward to a point preferably just below diagonally rearward slot at.

To the interior of the shuttle-shell is secured the bobbinsupporting pin or spindle D, preferably screwed into the shuttle-shell, as shown, said pin being provided with a head, (1, having a nick by which the pin may be turned by a screw-driver.

E is the bobbin-holding sleeve, preferably split, as shown in Figs. 5 and 6, said sleeve fitting loosely on the pin or spindle D, and tightly within the hollow bobbln F. \Vhen thus constructed, it is obvious that the sleeve and bobbin can turn readily on the sp1ndle as the thread is drawn off; but the head (1 will prevent the sleeve from coming off from the said spindle, and as the said sleeve has a frictional hold on the bobbin the latter will be prevented from accidentally falling out of the shuttle. As the bobbin is thus supported entirely by the spindle, the flanges of the former cannot come in contact with the interior of the shut tle, so that the tension of the thread is always uniform, and jerking and breakage is avoided.

The shuttle-shell is cut away at its heel in its lower side to form a recess, a, into which the thumb or finger nail of the operator can be inserted to remove the bobbin when desired. When the bobbin is inserted in the shuttle, it

to the thread-delivery the thread-guard b", whence it runs is simply forced onto the split sleeve E, which is compressed slightly as the bobbin is pushed over it.

Instead of splitting the frictional sleeve E, I may provide the same with one or more springs or spring fingers, as e, Fig. 7, secured to the said sleeve or struck up therefrom, said spring-fingers being compressed within the hollow bobbin when the latter-is placed in the shuttle.

As the rear end of the threading-slot C is at the lower side of the shuttle, it is impossible for either the needle or shuttle threads to catch therein as the shuttle rests in the carrier. The pin D and sleeve E hold the bobbin from longitudinal movement within the shuttle when the latter is in operation, and as the flanges of the bobbin do not touch the interior of the shuttle the bobbin does not rattle in the shuttle, so that the noise incidental to the operation of the machine is materially lessened by my invention.

I am aware that split sleeves have heretofore been used in connection with spool-pins and bobbin-supporting spindles for the purpose of securing a proper tension on the thread, and I do not therefore wish to be understood as claiming the combination of a frictionsleeve, a spool or bobbin, and a pin or spindle, broadly. 1

Having thus described my invention,I claim and desire to secure by Letters Patent- 1. The combination, with an open ended shuttle, of an interior bobbin-supporting pin or spindle provided at its outer end with an enlargement or head, a hollow bobbin, and a sleeve fitting loosely on the said pin or spindle and having a close-fitting frictional contact with the interior of said bobbin, said sleeve being retained on the said spindle by the said head and serving to hold the bobbin in the shuttle, substantially as set forth. 7

2. The combination, with the hollow bobbin, the supporting-pin, and the frictional sleeve, of the shuttle-shell provided at its heel with a recess, as a, extending within the outer flange of the said bobbin, substantially as set 

